Some further observations about the "Boost" shoes. Thursday I ran in my brand new Saucony Guide 6 shoes. Today I ran in my brand new Adidas Supernova Glide 6 Boost shoes. Both pairs of shoes felt good, and I like both. But the Boost shoes are unique. Here's how I would describe it:
On pavement, the Boost shoes really tame the hard surface. It feels like running on a rubberized track with great rebound. Late in the run, as I'm getting tired, I hear my feet slapping the ground more audibly than earlier in the run. The Boost shoes seem to encourage a heavier footstrike as my body gets tired. I think this is because even with the heavier footstrike, the perceptible shock is still very comfortable, and the "bounce" reduces effort. It's really a strange feeling. When my feet strike the ground, the cushion is really noticeable. In fact, momentarily my feet seem to "sink" into the shoes more than usual. Normally, with super soft insoles that you purchase separately from your running shoes, you feel your feet sinking into them, which is fine for standing. However, unlike those super soft insoles, which cause my legs to fatigue faster, the Boost material has that "sink" feeling, but with a noticeable BOUNCE. It's kind of like a mini-trampoline. That's probably not a good analogy, but I can't think of a better one. The overall feel of the Boost shoes is serious cushioning with a great bounce (like a nice rubberized track), and less leg fatigue.
Now, on grass or soft dirt, there is a totally different feel in the Boost shoes. It's a bit disconcerting and strange. The "sink" feeling of the cushion is perceptibly longer as the shoes sink into the soft surface. It almost feels TOO soft for a soft surface. However, despite this feeling, the delayed rebound or bounch catches up to the sink, and evens things out. I'm not sure yet whether I like this feeling on grass or soft dirt. It will take some time to get used to. You would think that a really cushioned shoe would totally suck on grass or soft dirt due to the increased effort to rebound from the double cushion of the shoes AND the soft ground, but that doesn't happen with the Boost shoes. I'm not sure yet whether I like this feeling on grass or soft dirt. It will take some time to get used to. I'm not sure whether I would like the Boost shoes in a grassy cross country race . . .
Overall, my Boost shoes are thus far my all-time favorites. We'll see how things go over time, and again, whether the advertised long-term durability of the Boost material is really that good. I'm really enjoying them right now, and from everything I've felt while running in them, I highly recommend that you find a pair at a decent price and try them out for yourself.